ICD-10 Code for Adenocarcinoma

The ICD-10-CM 2027 alphabetic index lists adenocarcinoma with the subterms below. More specific codes depend on the details documented, as listed in the official index (22 codes, 14 billable).

Index entries for Adenocarcinoma

acidophil
- specified site – see Neoplasm, malignant, by site
- unspecified site – C75.1
adrenal cortical – C74.0- (header)
alveolar – see Neoplasm, lung, malignant
apocrine
- breast – see Neoplasm, breast, malignant
- in situ
  - breast – D05.8- (header)
  - specified site NEC – see Neoplasm, skin, in situ
  - unspecified site – D04.9
- specified site NEC – see Neoplasm, skin, malignant
- unspecified site – C44.99
basal cell
- specified site – see Neoplasm, skin, malignant
- unspecified site – C08.9
basophil
- specified site – see Neoplasm, malignant, by site
- unspecified site – C75.1
bile duct type – C22.1
- liver – C22.1
- specified site NEC – see Neoplasm, malignant, by site
- unspecified site – C22.1
bronchiolar – see Neoplasm, lung, malignant
bronchioloalveolar – see Neoplasm, lung, malignant
ceruminous – C44.29- (header)
cervix, in situ – D06.9 – see also Carcinoma, cervix uteri, in situ
chromophobe
- specified site – see Neoplasm, malignant, by site
- unspecified site – C75.1
diffuse type
- specified site – see Neoplasm, malignant, by site
- unspecified site – C16.9
duct
- infiltrating
  - with Paget's disease – see Neoplasm, breast, malignant
  - specified site – see Neoplasm, malignant, by site
  - unspecified site (female) – C50.91- (header)
    - male – C50.92- (header)
- specified site – see Neoplasm, malignant, by site
- unspecified site
  - female – C56.9
  - male – C61
eosinophil
- specified site – see Neoplasm, malignant, by site
- unspecified site – C75.1
follicular
- with papillary – C73
- moderately differentiated – C73
- specified site – see Neoplasm, malignant, by site
- trabecular – C73
- unspecified site – C73
- well differentiated – C73
Hurthle cell – C73
in
- adenomatous
  - polyposis coli – C18.9
infiltrating duct
- with Paget's disease – see Neoplasm, breast, malignant
- specified site – see Neoplasm, by site, malignant
- unspecified site (female) – C50.91- (header)
  - male – C50.92- (header)
inflammatory
- specified site – see Neoplasm, by site, malignant
- unspecified site (female) – C50.91- (header)
  - male – C50.92- (header)
intestinal type
- specified site – see Neoplasm, by site, malignant
- unspecified site – C16.9
intracystic papillary
intraductal
- breast – D05.1- (header)
- noninfiltrating
  - breast – D05.1- (header)
  - papillary
    - with invasion
      - specified site – see Neoplasm, by site, malignant
      - unspecified site (female) – C50.91- (header)
        male – C50.92- (header)
    - breast – D05.1- (header)
    - specified site NEC – see Neoplasm, in situ, by site
    - unspecified site – D05.1- (header)
  - specified site NEC – see Neoplasm, in situ, by site
  - unspecified site – D05.1- (header)
- papillary
  - with invasion
    - specified site – see Neoplasm, malignant, by site
    - unspecified site (female) – C50.91- (header)
      - male – C50.92- (header)
  - breast – D05.1- (header)
  - specified site – see Neoplasm, in situ, by site
  - unspecified site – D05.1- (header)
- specified site NEC – see Neoplasm, in situ, by site
- unspecified site – D05.1- (header)
islet cell
- with exocrine, mixed
  - specified site – see Neoplasm, malignant, by site
  - unspecified site – C25.9
- pancreas – C25.4
- specified site NEC – see Neoplasm, malignant, by site
- unspecified site – C25.4
lobular
- in situ
  - breast – D05.0- (header)
  - specified site NEC – see Neoplasm, in situ, by site
  - unspecified site – D05.0- (header)
- specified site – see Neoplasm, malignant, by site
- unspecified site (female) – C50.91- (header)
  - male – C50.92- (header)
mucoid – see also Neoplasm, malignant, by site
- cell
  - specified site – see Neoplasm, malignant, by site
  - unspecified site – C75.1
nonencapsulated sclerosing – C73
papillary
- with follicular – C73
- follicular variant – C73
- intraductal (noninfiltrating)
  - with invasion
    - specified site – see Neoplasm, malignant, by site
    - unspecified site (female) – C50.91- (header)
      - male – C50.92- (header)
  - breast – D05.1- (header)
  - specified site NEC – see Neoplasm, in situ, by site
  - unspecified site – D05.1- (header)
- serous
  - specified site – see Neoplasm, malignant, by site
  - unspecified site – C56.9
papillocystic
- specified site – see Neoplasm, malignant, by site
- unspecified site – C56.9
pseudomucinous
- specified site – see Neoplasm, malignant, by site
- unspecified site – C56.9
renal cell – C64- (header)
sebaceous – see Neoplasm, skin, malignant
serous – see also Neoplasm, malignant, by site
- papillary
  - specified site – see Neoplasm, malignant, by site
  - unspecified site – C56.9
sweat gland – see Neoplasm, skin, malignant
water-clear cell – C75.0

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.